Hmm... running problem?

[P40MRT]

Strange one this.

For the past week or so, every now and again I get a lumpy/rough idle and slightly lumpy low-speed running.

I'm currently running with 40l of SVO per tankful (was running a 20l mix), and it has a PSI Powerbox and a K&N 57i.

The change in running has coincided roughly with the switch to a 40l mix and the fitting of the K&N - could just be coincidence though. Since this time, my fuel economy seems to have got very slightly worse. I've just topped up with diesel (about 26l) to dilute the SVO in case that's the problem. I've also undone the drain on the bottom of the fuel filter, but nothing comes out!

Any ideas?

Dale

 

[Adz]

Run it on diesel & see if that sorts it.?

Wake the std filter bk on too maybe.?

Gotta be fuel related though id of thought... Might just need a new filter if you havent done 1 recently.?

 

[P40MRT]

I think I need to investigate why the fuel filter isn't draining - am I right in thinking just opening the plastic tap thing on the bottom of the filter should start it draining? Even if I pump the plunger on top with that open, nothing comes out! Filter was last changed 8 months/6000 miles ago.

Dale

 

[Adz]

Umm...
Mine was done 6 weeks ago...
Just turned mine & nothing.?

So along with your "holding back" low down...

Why do the filters not drain.?



Calling "toolbox" or someone in the know.?......

 

[lacroupade]

My fuel filter leaks just fine when you turn the tap.....and the K&N should make no difference.....exactly what kind of SVO are you using? Personally I'd just cut back a bit on the mix.....I find 50/50 works just fine with no problems....sometimes a bit lumpy on startup but fine after that.....

 

[Adz]

My fuel filter leaks just fine when you turn the tap.....and the K&N should make no difference.....exactly what kind of SVO are you using? Personally I'd just cut back a bit on the mix.....I find 50/50 works just fine with no problems....sometimes a bit lumpy on startup but fine after that.....

Umm i'll av another look in the morning at the filter :nenau

I'd go with a couple of tanks of diesel & then start easing the svo back in, in that case :thumb2

 

[lacroupade]

Strange one this.

For the past week or so, every now and again I get a lumpy/rough idle and slightly lumpy low-speed running.

I'm currently running with 40l of SVO per tankful (was running a 20l mix), and it has a PSI Powerbox and a K&N 57i.

The change in running has coincided roughly with the switch to a 40l mix and the fitting of the K&N - could just be coincidence though. Since this time, my fuel economy seems to have got very slightly worse. I've just topped up with diesel (about 26l) to dilute the SVO in case that's the problem. I've also undone the drain on the bottom of the fuel filter, but nothing comes out!

Any ideas?

Dale

Dale I've just thought, its probably your Powerbox....

I have the same issue with the Tunit....if I put an SVO mix in I have to retune it, otherwise it hunts like buggery when I lift my foot off after using throttle.....but am I right in thinking the PB can't be adjusted, i.e. it just has a new, improved ECU map that overides the existing one? If so, then theres not much you can do other than stick with the 20 litres per tank.

Or disconnect it temporarily if thats possible, while running a higher mix?